Sensory Analysis and Cutaneous Mapping of Different Regional Anesthesia Techniques
Trial statusRecruiting
Trial phaseNot listed
Trial typeObservational
Biological sexAll
Age18-75
SponsorSamsun University
About this trial
This prospective observational study aims to evaluate and compare the sensory block distribution and regression patterns of two regional anesthesia techniques - External Oblique Plane Block (EOPB) and Serratus Intercostal Plane Block (SIPB) - in patients undergoing laparoscopic cholecystectomy.
Thirty adult patients (ASA I-III, BMI ≤ 35 kg/m², ≥50 kg) scheduled for elective laparoscopic cholecystectomy procedures will be included, with 20 in each block group. Sensory block areas will be assessed using pinprick test, and dermatomal mapping will visualize the spread. The findings are expected to improve understanding of block behavior and guide multimodal analgesia strategies in laparoscopic cholecystectomy.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Patients scheduled for elective laparoscopic cholecystectomy surgery and who have received a regional anesthesia technique for this purpose.
Aged between 18-75 years.
Belonging to ASA I-III group.
Having provided written informed consent.
Disqualifiers
Patients who refuse to participate.
Patients who did not receive a block.
Patients classified as ASA IV.
History of previous abdominal surgery (affecting the laparoscopic approach).
Trial population
Patients who are scheduled to undergo elective laparoscopic cholecystectomy surgery under general anesthesia at the Department of Anesthesiology, Samsun University Training and Research Hospital. A total of 40 patients will be enrolled and divided into two groups: EOPB (n=20) and SIPB (n=20). Each participant will receive ultrasound-guided regional anesthesia according to their assigned group, and sensory mapping will be performed postoperatively.
Trial design
Design model
Cohort
Time perspective
Prospective
Treatments tested in this trial
External Oblique Plane Block (EOPB)
Procedure/SurgeryUltrasound-guided External Oblique Plane Block (EOPB) performed bilaterally using 0.25% bupivacaine (25 mL per side, total 50 mL) for postoperative analgesia in laparoscopic cholecystectomy.
Serratus Intercostal Plane Block (SIPB)
Procedure/SurgeryUltrasound-guided Serratus Intercostal Plane Block (SIPB) performed bilaterally using 0.25% bupivacaine (25 mL per side, total 50 mL) for postoperative analgesia in laparoscopic cholecystectomy.
Treatment groups
40 Participants
are divided into 2 treatment groupsGroup A: EOPB Group1 intervention
Group B: SIPB Group1 intervention
Trial outcomes
Primary outcomes
1
Cutaneous Sensory Block Area of EOPB and SIPB
The primary outcome is the dermatomal mapping of the cutaneous sensory block areas produced by the serratus intercostal plane block (SIPB) and external oblique plane block (EOPB), and the comparison of sensory block extent between the two techniques.
Time frame
30 minutes after block applicationSecondary outcomes
1
Coverage of Surgical Port Entry Sites by the Sensory Block Area
After examination and mapping of the cutaneous sensory area, surgical port entry sites will be marked on the patient by the surgeon. Port entry sites covered and not covered by the sensory block area will be assessed and compared between the two groups on a percentage basis.
Time frame
30 minutes after block application2
Maximum and Minimum Spread of the Cutaneous Sensory Block Area
The minimum and maximum dermatomal boundaries of the cutaneous sensory block area produced by each regional anesthesia technique will be assessed using sensory mapping and compared between the two groups.
Time frame
30 minutes after block application3
Block Application Duration
During regional anesthesia administration, the duration of block application will be measured in minutes for each technique and compared between the two groups.
Time frame
From needle insertion to completion of local anesthetic injectionSponsors and contacts
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Source ClinicalTrials.gov